Merge branch 'fix-image-file-is-not-displayed' into 'master'

CHANGELOG

@@ -3,6 +3,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 v 7.14.0 (unreleased)
   - Fix network graph when branch name has single quotes (Stan Hu)
   - Upgrade gitlab_git to version 7.2.6 to fix Error 500 when creating network graphs (Stan Hu)
+  - Fix the image file that contains non-ascii character is not displayed(Hiroyuki Sato)
   - Fix URL used for refreshing notes if relative_url is present (Bartłomiej Święcki)
   - Fix commit data retrieval when branch name has single quotes (Stan Hu)
   - Check that project was actually created rather than just validated in import:repos task (Stan Hu)

lib/gitlab/markdown/relative_link_filter.rb

@@ -98,9 +98,10 @@ module Gitlab
       #
       # Returns a String
       def path_type(path)
-        if repository.tree(current_sha, path).entries.any?
+        unescaped_path = Addressable::URI.unescape(path)
+        if repository.tree(current_sha, unescaped_path).entries.any?
           'tree'
-        elsif repository.blob_at(current_sha, path).try(:image?)
+        elsif repository.blob_at(current_sha, unescaped_path).try(:image?)
           'raw'
         else
           'blob'